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MPETERS, PHOFO-UTHOGRAPHER. WASHINGTON Lv C if; iii

Letters Patent No. 93,874, dated largest 17, 1869; patented 'in England,August 25, 1866.

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IMPROVEMENT IBL' BOILER-TU'BE-SCRAPING- DEVICE.

The Schedule referred to inthese Ietters Patent and making part Of thesame.

To all to wiz-om 'itfmdy con-cern.:

Be it known that I, EDWARD Gummi, of Wakelield,-Englaud, engineer, haveinvented or discovered certain Improvements in Gearing or Apparatus forUi-i'ving Scrapers, Employed in Cleansing the Fines and lubes ot'Boilers and Heating-Apparatus; ,and l do hereby declare that thefollowing isy a full, true, and exact description thereof', referencebein,r .had to the drawings hereunto annexed; that is to sa My inventionrelates chiefly to the Scrapers used in what are known asfuel-econoinizers, for keeping the surface ofthe pipes of theeconoinizers clean, and free from soot, and other deposit, TheseScrapers are ordinarily worked by chains passed over pulleys formed witha V- Troove.

My invention consists- ,y l

hirst, in devices for one reversing mot-ion for several pulleys, i'ouiidwhich thc scraper-chains pass, such pulleys being driven by worms, orother gearing;

Secondly, in the arr rement ot' the gearing, ,and arms, whereby toobtain a techn-coating motion;

Zifliiidly, in devices for altering the length of tiaverse; i.v Y

Fourthly, in the devices for fitting the dormi-wheels loosely upon theshafts of the V-pulleys, so Vthat they .may be fastened thereon atpleasure, or any one -or more of them thrown out of gear; and ,l Y

Fiftlily, iii the devices for removing the ,ive-ight from thedriving-clutch box and gearing`ivlyieu the clutch-box is getting justinto gear, and reversing, by means of a slot in the pulleys, all aslyie-ieaftery described.

Figure l, of the accompanying drawings, Iisa plan; Figure 2, a sideelevation; l ,i Iiigure', an end elevation, representing myiinproveinents; and I Figures 4, 5, and 6, are enlarged views otrtheprincipal actuating-parts, shown, in the previously-named generalriew's, detached. Y Upon a shaft, a., on which is mount-ed ai pulley, b,driven from the engine, or otherwise, I fit, by means ot' a feather orkey, a sliding-clutch box,.c, which drives a' pair ofbevel-pinions, d c,mounted theieon.

These pinions drive a bevel-wheel, f, on the end, of. a shaft,'g,formed, .atvintervals, with w ri',- Je, to gear into and driveworm-wheels, i.

These worin-wheels are mounted loosg drive shafts, j, of the V-pulleys7;, round 'hi,h the scraper-chains l pass. a i' ,l u l 'lhe worm-wheelsi, or other gearing, aire mounted loosely upon the shafts of theV-piilleysk,L hatI each is fastened, when required, by means of aset-screw, m., passed through a slot, n, in the pulley; l,

lhe chains l thus receive motion forworking the Scrapers; but, in orderto couvert this positive` motion of the chains into a reciprocatingmotion, I adopt the following arrangement:

-I cause one of the worin-wheels t, by preference that next thebevel-wheel f, to gear, as'shown, into a pinion, o, ou a worm-shaft, p,the worin q of which drives an idle worm-wheel, 'r, and this, 'in itsturn, gears into and drives another wheel, s,l working on a stud, t.

On this stud or centre, I place a pair of arms, u u, the position ofwhich is adjustable by means or a set-screw and slot-hole, c, to allowthese arms 'u u to be set to any position, with the object of 'alteringthe length of tri verse of the chains l.

As these ari'ns u u. move round, one of 'themi at" the proper time,comes against a knoclr-oi'fei'` lever, zc, which is pivoted at its lowerend, while'- its upper end is, by preference, weighted. n

"When this lever is carried by the arin u past .its centre, it yptalls,by'its own weight, into the opposite position to that it beforeoccupied, and, -1n so falhng, it moves the clutch-box c, and therebyreverses the motion.

By removing any one of the set-screws 1n, which fasten the V-pulleys7;,110 further motion will be given to the particular pulley, itsworin-wheel i, or other gearing, would then rui-i idle. This pulley maythen be repaired without stopping the others, and a handle may be ittedto the square end of its shaft, to allow of the scraper or Scrapers,connected therewith, heilig worked by hand.

When the clutch-box c is getting just into gear, vand reversing; theweight is thrown ott' it by means of the slots n, allowing theworm-wheels 'i to travel a certain distancewitliout driving theV-pnlleys k andV chains l.

Sometimes, instead ofthe arrangement of reversinggearing, hereinbeforedescribed, I employ other wellknown motions, and, in` this case, as theV-piilleys` k and Scrapers stand for -a short time when the reversing istaking plaee,o\vi1ig to the driving set-screws 'm working in the slots12'before described, the weight is thrown off the main driving-gearingwhen reversing is taking place.

I do not, howevei-claini the employment of other motions for giving thereciprocating motion, except when used in conjunction with two oi moresets of pulleys, and tlieset-screws, and slots, anddisconnecting-wheels, as hereinbefore explained.

lVhat I claim as my invention, and desire to secure by Letters Patent,is

1` The clutch-box c, bevel-pii'iions d e, bevel-wheel f, constructed audarranged to operate as described.

2'. The worm-wheel i, mounted loosely on shaft of pulley k, iiicombination with saidl pulley, set-screws m, and slots n, substantiallyas described.

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In witness whereof, I',Athe said EDWARD GREEN, have hereunto set myhand, this vday of '1869; i

EDWARD GREEN.

Witnesses:

J. SMITH, Wqkqeld. J. Scomf, Wakqeld.

